CN112839621A - Wet wipes having enhanced dispersibility - Google Patents
Wet wipes having enhanced dispersibility Download PDFInfo
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- CN112839621A CN112839621A CN201980067630.1A CN201980067630A CN112839621A CN 112839621 A CN112839621 A CN 112839621A CN 201980067630 A CN201980067630 A CN 201980067630A CN 112839621 A CN112839621 A CN 112839621A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/0208—Tissues; Wipes; Patches
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/0241—Containing particulates characterized by their shape and/or structure
- A61K8/027—Fibers; Fibrils
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/20—Halogens; Compounds thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
- A61K8/34—Alcohols
- A61K8/345—Alcohols containing more than one hydroxy group
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/73—Polysaccharides
- A61K8/731—Cellulose; Quaternized cellulose derivatives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
- A61K8/86—Polyethers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
- A61Q19/10—Washing or bathing preparations
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/25—Cellulose
- D21H17/27—Esters thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/002—Tissue paper; Absorbent paper
- D21H27/004—Tissue paper; Absorbent paper characterised by specific parameters
- D21H27/005—Tissue paper; Absorbent paper characterised by specific parameters relating to physical or mechanical properties, e.g. tensile strength, stretch, softness
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/02—Synthetic cellulose fibres
- D21H13/08—Synthetic cellulose fibres from regenerated cellulose
Abstract
The present disclosure relates to a wet toilet paper, cleaning wipe or personal wipe having improved dispersibility. The wet toilet paper, cleaning wipes and personal wipes are strong enough during use and disperse quickly enough under real life conditions to make them flushable without causing potential problems to the hygiene system.
Description
Technical Field
The present invention relates to wipes having improved dispersibility as compared to existing dispersible wipes including wet toilet tissue, cleaning, disinfecting and disinfecting wipes, and personal care wipes. The wipes have sufficient in-use strength and improved dispersibility as compared to existing products.
Background
Many wipe products that are not designed to be rinsed are rinsed, including baby, surface and personal sanitary wipes. Certain types of wipes are suitable for rinsing after use. Ideally, such flushable wipes disintegrate and disperse relatively quickly in municipal hygiene systems. At the same time, a dispersible wipe should not disintegrate so quickly that it fails during its proposed use.
Some of the known flushable wipes on the market require a relatively long period of time and/or agitation and/or thermal energy in water to reduce their post-use strength sufficiently to disperse them.
Currently commercially available flushable wipe products include a nonwoven component composed of short cellulose fibers (pulp) and long cellulose fibers. Other products may use salt-activated binders composed of short and medium length cellulose fibers, binder systems composed of one or more components, and liquids that maintain wipe strength due to salt concentrations higher than those found in typical municipal wastewater systems. The fibers may be bonded together by chemical and/or mechanical processes. After use, these products can be rinsed because they are designed to disintegrate and disperse during their passage through the piping system where they are introduced into agitation and high water volumes.
An ideal flushable wipe would have sufficient comfort and strength for its intended purpose and would disperse very quickly after rinsing. The faster such wipes disperse, the less likely that potential problems such as downstream clogging will occur. Thus, the technical challenge is to produce wipes having seemingly contradictory properties of in-use strength and rapid dispersibility after use.
Accordingly, there is a need to provide an improved dispersible wipe that (i) is sufficiently strong during use, and (ii) disperses rapidly (under real-life conditions) to avoid problems with the hygiene system.
Disclosure of Invention
The present invention relates to wet wipes having improved dispersibility and sufficient strength for use, inter alia, as wet toilet paper, cleaning, disinfecting and sanitizing wipes, and/or other personal care wipes. The present invention is a significant advance over the current art in that it provides, for example, a wet wipe that is comprised of a homogeneous fibrous material (e.g., nonwoven) component that is not hydroentangled and a liquid component that disperses faster than current commercial products. Surprisingly, the wet toilet paper of the present invention disperses even faster than conventional toilet paper.
For a number of reasons, the present invention is technically distinctive and advanced relative to existing dispersible wipe products. The homogeneous fibrous material (e.g., nonwoven) component of the present invention is not formed by hydroentanglement, and its dispersion does not rely on disentanglement of the fibers. The wet wipes of the present invention disperse more rapidly than prior products including hydroentangled nonwoven components.
By combining a non-woven, non-hydroentangled homogeneous fibrous component with a novel liquid component, the present inventors have encountered the challenge of obtaining a more rapidly dispersible wipe that still provides sufficient safety, comfort and strength.
Furthermore, through experimentation, the present inventors have identified certain liquid components for the presently claimed products that provide one or more of the following additional beneficial features: i) improved aesthetic characteristics such as improved skin feel (less greasy and/or sticky), ii) improved sedimentation properties, iii) improved odor control, iv) improved preservative quality, v) enhanced pH stability, vi) reduced toxicity and vii) reduced production costs.
In one aspect, the present invention is directed to a wet wipe comprising:
a. a homogeneous fibrous material (e.g., a nonwoven material) comprising one or more water-soluble binders; and
b. a liquid component comprising
i. About 65 to about 90% w/w (e.g., about 65 to about 75% w/w or about 70 to about 75% w/w) of water,
about 10 to about 35% w/w (e.g., about 10 to about 25% w/w or about 15 to about 20% w/w) of an organic solvent, and
from about 1 to about 10% w/w (e.g., from about 3 to about 5% w/w) of a multivalent (e.g., divalent) salt.
In another aspect, the present invention is directed to a wet wipe comprising:
a. homogeneous fibrous materials (e.g., nonwovens) comprising one or more water-soluble binders and
b. a liquid component comprising
i. About 0% to about 80% w/w (e.g., about 10% to about 60% w/w or about 25% to about 35% w/w) of water,
about 20 to about 100% w/w (e.g., about 10 to about 25% w/w or about 15 to about 20% w/w) of an organic solvent, and
optionally, from about 0 to about 10% w/w (e.g., from about 3 to about 5% w/w) of a multivalent (e.g., divalent) salt.
In an embodiment of the invention, the homogeneous fibrous material comprises wood pulp and carboxymethylcellulose (CMC).
The multivalent salt may be an inorganic or organic multivalent salt. In one embodiment, the multivalent salt is a divalent salt. Suitable examples of multivalent salts include, but are not limited to, salts of alkaline earth metals and transition metals. Suitable divalent cations include, but are not limited to, Zn2+、Be2 +、Mg2+And Ca2+And any combination thereof. Suitable anions include, but are not limited to, halides (fluoride, chloride, bromide, iodide), sulfate, sulfite, thiosulfate, carbonate, oxide, nitrate, nitrite, phosphate, hydrogen phosphate, and the like. For example, a multivalent salt may be, but is not limited to: ZnF2、ZnCl2、ZnBr2、ZnI2、MgF2、MgCl2、MgBr2、MgI2、BeF2、BeCl2、BeBr2、BeI2、CaF2、CaCl2、CaBr2、CaI2、ZnSO4、ZnSO3、BeSO4、BeSO3、MgSO4、MgSO3、CaSO4、CaSO3ZnO, MgO, CaO, BeO, and any combination thereof.
In one embodiment, the organic solvent may be an alcohol, such as a polyol or a polyol ether. In one aspect of the invention, the liquid component is primarily an organic solvent. In certain embodiments, the alcohol is ethanol, isopropanol, or a combination thereof. As used herein, "primarily" means greater than 50%.
The disinfectant wipe of the present invention, which is composed of a homogeneous nonwoven material, has advantageous properties when wetted by a liquid component composed primarily of alcohol. For example, the homogeneous nonwoven material of the present invention loses less strength when wetted with a liquid component consisting essentially of alcohol according to the present invention than when wetted with water.
The water-soluble binder can be made from a variety of materials, including natural fibers, synthetic fibers, and any combination thereof.
The liquid component may further comprise an oil-in-water emulsion, such as an emulsion comprising cetearyl isononanoate, ceteareth-20, cetearyl alcohol, glyceryl stearate, glycerol, cetyl palmitate, and ceteareth-12.
In another embodiment, any of the liquid components described herein further comprises a humectant (e.g., glyceryl polyether-26). In one embodiment, the liquid component comprises about 1 to about 15% w/w humectant (e.g., glyceryl polyether-26).
In another aspect, the present invention relates to a wet wipe comprising:
a. a homogeneous fibrous material (e.g., a nonwoven material) comprising one or more water-soluble binders; and
b. a liquid component comprising water, an organic solvent, a multivalent (e.g., divalent) salt, a chelating agent, an emulsifier, an emollient, a humectant, a pH adjusting agent, and a odor neutralizer.
In another aspect, the present invention relates to a wet toilet paper comprising:
a. a homogeneous fibrous material (e.g., a nonwoven material) comprising one or more water-soluble binders; and
b. a liquid component comprising
i. About 65 to about 90% w/w (e.g., about 65 to about 75% w/w or about 70 to about 75% w/w) of water,
about 10 to about 35% w/w (e.g., about 10 to about 25% w/w or about 15 to about 20% w/w) of an organic solvent, and
from about 1 to about 10% w/w (e.g., from about 3 to about 5% w/w) of a multivalent (e.g., divalent) salt,
from about 0.01 to about 1% w/w of a chelating agent,
from about 0.005 to about 5% w/w emulsifier,
from about 0.005 to about 5% w/w of an emollient,
from about 1 to about 15% w/w humectant,
about 0.01 to about 5% w/w of a pH adjusting agent, and
from about 0.01 to about 5% w/w odor neutralizer.
In additional embodiments, any of the liquid components described herein further comprise one or more fragrances.
In additional embodiments, any of the liquid components described herein can further comprise magnesium aluminum silicate, xanthan gum, corn starch, silica, and any combination thereof.
In another aspect, the present invention is directed to a wet wipe comprising:
a. a homogeneous fibrous material (e.g., a nonwoven material) comprising one or more water-soluble binders; and
b. a liquid component comprising
i. About 65 to about 90% w/w (e.g., about 65 to about 75% w/w or about 70 to about 75% w/w) of water,
about 10 to about 35% w/w (e.g., about 10 to about 25% w/w or about 15 to about 20% w/w) of an organic solvent, and
from about 1 to about 10% w/w (e.g., from about 3 to about 5% w/w) of a multivalent (e.g., divalent) salt,
from about 0.1 to about 1% w/w of a first preservative;
from about 0.1 to about 1% w/w of a second preservative;
from about 0.0001 to about 0.1% w/w of a first soothing agent;
about 0.01 to about 0.2% w/w of a pH adjusting agent;
from about 0.0001 to about 0.5% w/w of a second soothing agent;
from about 0.01 to about 1% w/w of a chelating agent;
x, about 0.01 to about 5% w/w of a pH adjusting agent;
from about 0.005 to about 5% w/w emulsifier;
about 0.01 to about 5% w/w odor neutralizer;
from about 0.01 to about 5% w/w of a perfume;
from about 1 to about 15% w/w humectant; and
xv. from about 0.005 to about 5% of an emollient.
In additional embodiments, any of the wet wipes described herein exhibits one or more of the following characteristics (i) - (vi):
(i) in additional embodiments, any of the wet wipes described herein exhibits one or more of the following characteristics (i) - (vi):
(i) in one embodiment, any of the wipes described herein exhibits a wet tensile strength in the machine direction of greater than or equal to about 150 grams/inch and a wet tensile strength in the cross-machine direction of greater than about 75 grams/inch. In one embodiment, after immersion in water for any duration, the machine direction wet tensile is reduced to less than or equal to about 50 grams/inch and the cross direction wet tensile is reduced to less than or equal to about 25 grams/inch.
(ii) In one embodiment, any of the wet toilet paper, cleaning wipe, or personal care wipe described herein exhibits a machine direction wet tensile strength of greater than or equal to about 150 grams/inch and a cross direction wet tensile strength of greater than about 75 grams/inch. In one embodiment, the machine direction wet tensile and the cross direction wet tensile decrease such that they cannot be measured after any duration of immersion in water.
(iii) In one embodiment, any of the wet wipes described herein exhibits a wet tensile strength in the machine direction of greater than or equal to about 150 grams/inch and a wet tensile strength in the cross direction of greater than about 75 grams/inch.
In one embodiment, the wet toilet paper, cleaning wipe, or personal care wipe has a dispersion rate of greater than or equal to about 90% after a time of about 10 seconds when measured according to the fg502.r1(18) sloshing box disintegration test described in the Guidelines for Assessing Flushability of Disposable Nonwoven Products. Methods for Assessing the Compatibility of Disposable Nonwoven Products with piping and Wastewater Infrastructure (A Process for assembling the Compatibility of dispersible Nonwoven Products with plumb and Water Infrastructure), 4 th edition,
INDA and EDANA, 2018, which are incorporated herein by reference in their entirety.
In one embodiment, the wet wipe has a dispersion greater than or equal to about 70% after a time of about 1 minute when measured according to the fg502.r1(18) sloshing box disintegration test described in the flushability guidelines for evaluating disposable nonwoven products. A method of assessing the compatibility of disposable nonwoven products with plumbing and wastewater infrastructure, fourth edition,
INDA and EDANA, 5 months 2018, which are incorporated herein by reference in their entirety.
In one embodiment, the wet wipe has a dispersion greater than or equal to about 50% after a time of about 2 minutes when measured according to the fg502.r1(18) sloshing box disintegration test described in the flushability guidelines for evaluating disposable nonwoven products. A method of assessing the compatibility of disposable nonwoven products with plumbing and wastewater infrastructure, fourth edition,
INDA and EDANA, 5 months 2018, which are incorporated herein by reference in their entirety.
In one embodiment, the wet wipe has a dispersion greater than or equal to about 30% after a time of about 5 minutes when measured according to the fg502.r1(18) sloshing box disintegration test described in the flushability guidelines for evaluating disposable nonwoven products. A method of assessing the compatibility of disposable nonwoven products with plumbing and wastewater infrastructure, fourth edition,
INDA and EDANA, 5 months 2018, which are incorporated herein by reference in their entirety.
(iv) In one embodiment, when tested according to the home pump test described in the fourth edition flushability guidelines document of INDA, fg503.r1(18), home pump test, which is incorporated herein by reference in its entirety, any wet wipe described herein loses all tensile strength in the machine and cross directions when flushed in a toilet bowl, and splits to less than 1/2 inches under the turbulence of a single flush of a standard home toilet bowl as the wet wipe passes through the toilet bowl hole for transfer to the home pump sump2Without any clogging in the household pump or leaving any remaining intact wipe in the bath.
(v) In one embodiment, any of the wet wipes described herein, which when soaked in water to pass through a municipal pump, exhibit a longitudinal tensile strength of less than about 50 grams/inch and a transverse tensile strength of less than about 25 grams/inch when tested according to the fourth edition flushability guidelines document of INDA fg507.r1(18) municipal sewage pump test, which is incorporated herein by reference in its entirety, the wet wipes break to equal to or less than 1/2 inches2Resulting in less than 2% power increase or no power increase.
(vi) In one embodiment, when tested in accordance with the fourth edition flushability guide document of INDA, fg507.r1(18), the municipal sewage pump test (which is incorporated herein by reference in its entirety), any of the wet wipes described herein do not exhibit measurable strength when soaked in water to pass through the municipal pumpSaid wipes being broken to equal to or less than 1/2 inches2Resulting in less than 2% power increase or no power increase.
In another embodiment, the wet wipes described herein are packaged.
The present invention provides a wet wipe comprising:
a. a homogeneous fibrous material comprising one or more water-soluble binders; and
b. a liquid component comprising
i. About 74% w/w of water,
about 15% w/w dipropylene glycol,
about 5% w/w of glyceryl polyether 26, and
about 4% w/w calcium chloride.
The liquid component may further comprise chelating agents, emulsifiers, emollients, humectants, pH adjusters, odor neutralizers and fragrances.
In some aspects, the liquid component further comprises magnesium aluminum silicate, xanthan gum, corn starch, silica, and any combination thereof.
The wet wipe of the present invention comprises:
a. a homogeneous fibrous material comprising one or more water-soluble binders; and
b. a liquid component comprising
i. From about 58 to about 79% w/w water,
about 0 to about 10% w/w dipropylene glycol,
from about 0 to about 10% w/w of glyceryl polyether 26,
from about 0 to about 4% w/w calcium chloride, and
from about 5 to about 20% w/w ethanol.
The wet wipes of the present invention exhibit a wet tensile strength in the machine direction of greater than or equal to about 150 grams/inch and a wet tensile strength in the cross direction of greater than about 75 grams/inch. After immersion in water for any duration, the wipe according to the present invention has a machine direction wet tensile that decreases to less than or equal to about 50 grams per inch and a cross direction wet tensile that decreases to less than or equal to about 25 grams per inch. In the wet wipes, cleaning wipes or personal wipes of the present invention, the machine direction wet tensile strength and the cross direction wet tensile strength are reduced such that they are no longer measurable after any duration of immersion in water.
In a wet wipe, cleaning wipe, or personal wipe of the present invention, the wipe has a dispersion of greater than or equal to about 90% after a time of about 10 seconds when measured according to the fourth edition flushability guide document fg502.r1(18) sloshing box disintegration test of INDA.
In a wet wipe, cleaning wipe, or personal wipe of the present invention, the wipe has a dispersion of greater than or equal to about 70% after a time of about 1 minute when measured according to the fourth edition flushability guide document fg502.r1(18) sloshing box disintegration test of INDA.
In a wet wipe, cleaning wipe, or personal wipe of the present invention, the wipe has a dispersion of greater than or equal to about 50% after a time of about 2 minutes when measured, for example, according to the fourth edition of the flushability guide document fg502.r1(18) sloshing box disintegration test of INDA.
In a wet wipe, cleaning wipe, or personal wipe of the present invention, the wipe has a dispersion of greater than or equal to about 30% after a time of about 5 minutes when measured according to the fourth edition flushability guide document fg502.r1(18) sloshing box disintegration test of INDA.
In a wet wipe, cleaning wipe or personal wipe of the present invention, when tested according to the home pump test described in the fourth edition flushability guideline document fg503.r1(18) home pump test of INDA, the wipe loses all tensile strength in the machine and cross directions when flushed in a toilet bowl, and the wipe splits to less than 1/2 inches under the turbulence of a single flush of a standard home toilet bowl as the wipe passes through the toilet bowl hole for transfer to the home pump sump2Without any clogging in the household pump or leaving any remaining intact wipe in the bath.
In a wet wipe, cleaning wipe or personal wipe according to the present invention, when tested according to the fourth edition flushability guideline document fg507.r1(18) of INDA municipal sewage pumps test, when soaked in water to be passed throughUpon passing through a municipal pump, the wipes exhibit a machine direction tensile strength of less than about 50 grams/inch and a cross direction tensile strength of less than about 25 grams/inch, the wipes break to equal to or less than 1/2 inches2Resulting in less than 2% power increase or no power increase.
In a wet wipe, cleaning wipe or personal wipe of the present invention, which wipe breaks to equal to or less than 1/2 inches when immersed in water to pass through a municipal pump, the wipe exhibits no measurable strength when tested according to the fourth edition flushability guide document of INDA, fg507.r1(18), municipal sewage pump test2Resulting in less than 2% power increase or no power increase.
According to the present invention, a wet wipe, a cleaning wipe or a personal wipe is packaged.
In one aspect, the homogeneous fibrous material is comprised of 100% plant-based material.
In another aspect, the liquid further comprises a quaternary ammonium compound.
Homogeneous fibrous materials according to the present invention comprise from about 50 to about 99% w/w of one or more cellulosic fibers and one or more water-soluble binders.
In various aspects of the invention, the one or more cellulosic fibers comprise pulp fibers or regenerated cellulosic fibers, and the one or more water-soluble binders comprise carboxymethyl cellulose.
According to aspects of the present invention, the one or more cellulosic fibers are present at about 75 to 99% w/w of the total weight of the wipe, and the carboxymethyl cellulose is present at about 1 to about 25% w/w of the total weight of the wipe.
According to embodiments of the present invention, the regenerated cellulose fibers may be viscose, lyocell or a combination thereof. In a further aspect, the regenerated cellulose fibers are present from about 10 to about 50% w/w of the total weight of the wipe.
Drawings
FIG. 1 is a scanning electron micrograph of a cross-section of a homogeneous fiber component.
Fig. 2 is a scanning electron micrograph of a cross-section of a homogeneous fiber component.
Fig. 3 is a scanning electron micrograph of the heterogeneous fiber component. The nonwoven wet sheet was air dried and stained with an iodine vapor stain for 72 hours to highlight the binder distribution.
Fig. 4 is a scanning electron micrograph of a cross-section of a heterogeneous fiber component. The nonwoven wet sheet was air dried and stained with an iodine vapor stain for 72 hours to highlight the binder distribution.
Detailed Description
The rate and overall dispersibility of the wet-dispersible wipe can be determined by one of ordinary skill in the art, for example, as described in the guidelines for evaluating flushability of disposable nonwoven products. A method of assessing the compatibility of disposable nonwoven products with plumbing and wastewater infrastructure, fourth edition,
INDA and EDANA, 5 months 2018 ("guideline") (see www.edana.org and www, INDA, org), which are incorporated herein by reference in their entirety.
According to the guidelines, for a product to be considered flushable, there must be evidence that the product (1) cleans the toilet and properly maintains the drain system when correctly following the instructions recommended by the supplier; (2) through a wastewater delivery system and compatible with wastewater treatment, reuse, and disposal systems without causing system blockages, or other operational problems; and (3) is not identifiable in the wastewater left by on-site and municipal wastewater treatment systems and digested sludge from wastewater treatment plants applied to the soil. When a product meets this assessment requirement, it is considered washable and can be identified according to the INDA/EDANA Code of Practice operating rules.
Homogeneous fiber component
In one embodiment, the homogeneous fibrous material described herein comprises a nonwoven material.
As used herein, the terms "nonwoven agent" or "nonwoven material" or "nonwoven substrate" of the "nonwoven component" refer to materials and webs of material that are formed without the aid of a textile weaving or knitting process.
As used herein, "homogeneous fibrous material," "homogeneous fibrous component," and "homogeneous nonwoven material" refer to the different compositions of fibrous material or fibrous component being integrated, rather than isolated. Illustrations of "homogeneous fibrous material", "homogeneous fibrous component", and "homogeneous nonwoven material" are shown in fig. 1-3.
Wet toilet paper according to the present invention may typically have a fiber density of from about 0.025g/cc to about 0.2 g/cc. The wet toilet paper according to the present invention may typically have a basis weight of from about 20gsm to about 150gsm, such as between about 30 to about 90gsm or about 50gsm to about 60 gsm.
The nonwoven material may comprise one or more water-soluble binders made from natural fibers, synthetic fibers, and any combination thereof. The choice of fiber depends on, for example, the intended end use of the final product and the cost of the fiber. For example, suitable fibrous substrates may include, but are not limited to, natural fibers such as cotton, flax, jute, hemp, wool, wood pulp, and the like. Similarly, regenerated cellulose fibers such as viscose rayon and cuprammonium rayon, modified celluloses such as cellulose acetate, or synthetic fibers such as those derived from polypropylene, polyethylene, polyolefins, polyesters, polyamides, polyacrylates, and the like, can likewise be used alone or in combination with one another. Blends of one or more of the above fibers may also be used if desired. Among the wood pulp fibers, any known papermaking fibers can be used, including softwood and hardwood fibers. The fibers may be, for example, chemically or mechanically pulped, bleached or unbleached, virgin or recycled, high or low yield, etc. Mercerized, chemically stiffened or crosslinked fibers may also be used.
Synthetic cellulosic fiber types include rayon and all its varieties, as well as other fibers derived from viscose or chemically modified cellulose, including regenerated cellulose and solvent-spun cellulose, such as lyocell. Chemically treated natural cellulosic fibers such as mercerized pulp, chemically stiffened or crosslinked fibers, or sulfonated fibers may be used. Recycled fibers as well as virgin fibers may be used. Cellulose produced by microorganisms and other cellulose derivatives may be used. As used herein, the term "cellulose" is meant to include any material based on cellulose, e.g., comprising at least 50% by weight of cellulose or cellulose derivatives. Thus, the term includes, but is not limited to, cotton, typical wood pulp, non-lignocellulosic fibers, carboxymethyl cellulose, cellulose acetate, cellulose triacetate, rayon, thermomechanical wood pulp, chemical wood pulp, degummed chemical wood pulp, dairy grass, or bacterial cellulose. Polylactic acid (PLA), polyethylene terephthalate, polypropylene and nylon may also be used.
The nonwoven component may further comprise a surfactant. Non-limiting examples of suitable surfactants include: sodium lauryl sulfate, 1-undecanol, 1-octyl-2-pyrrolidone (Surfadone LP-100), undecanol +5EO polyethoxylates (polyethylene glycol (5) undecyl ether), 1-dodecyl-2-pyrrolidone (Surfacone LP-300), and combinations thereof. Examples of surfactant combinations are sodium lauryl sulfate, 1-undecanol, 1-octyl-2-pyrrolidone and undecanol +5EO polyethoxylate (polyethylene glycol (5) undecyl ether). The surfactant may be added to the carboxymethyl cellulose (CMC) and aqueous solution to be sprayed onto the fibrous material. The amount of surfactant may be between 0.001% and 2% of the CMC and water spray solution.
Liquid component
The liquid components described herein may be substantially free (e.g., contain less than about 0.04 wt%, less than about 0.03 wt%, less than about 0.02 wt%, less than about 0.01 wt%, or less than about 0.005 wt%) of benzalkonium chloride, or free of benzalkonium chloride.
The liquid component described herein can be substantially free (e.g., containing less than about 0.08 wt%, less than about 0.05 wt%, less than about 0.04 wt%, less than about 0.02 wt%, less than about 0.01 wt%, or less than about 0.005 wt%) of, or free of, iodopropynyl butyl carbamate.
Optionally, the liquid components described herein can be substantially free (e.g., containing less than about 0.03 wt%, less than about 0.02 wt%, less than about 0.01 wt%, less than about 0.005 wt%, or less than about 0.001 wt%) of benzalkonium chloride, iodopropynyl butyl carbamate, laureth-9, vinyl dimethicone/methicone silsesquioxane crosspolymer, and combinations thereof.
The liquid component according to embodiments described herein may further comprise one or more additional compounds such as, but not limited to, carrier medium(s), surfactants (e.g., cationic, anionic, nonionic, amphoteric), pH adjusting/pH controlling agents, perfumes, perfume solubilizing agents, opacifiers, preservatives, skin soothing aids/soothing agents, skin care additives, odor control additives/odor neutralizers, chelating agents, detackifying agents, humectants, cleansers, skin conditioning agents, preservatives, antimicrobial agents, emollients, humectants, sensory (surface feel) modifiers, and the like.
Non-limiting examples of chelating agents include disodium EDTA, sodium gluconate, phytic acid, sodium phytate, trisodium EDTA, tetrasodium glutamate diacetate, etidronic acid, gluconic acid, pentasodium triphosphate, sodium polyphosphate, and trisodium phosphate.
Skin care additive
As used herein, the term "skin care additive" means an additive that provides one or more benefits to the user, such as reducing the likelihood of diaper rash and/or other skin damage caused by fecal enzymes. Suitable skin care additives include, but are not limited to, enzyme inhibitors and masking agents as set forth below.
A variety of skin care additives may be added to or included in the liquid component and wet toilet paper of the present invention. In one embodiment, the skin care additive is added in particulate form to act as a fecal enzyme inhibitor, providing potential benefits in reducing diaper rash and skin damage caused by fecal enzymes. U.S. patent No. 6,051,749 discloses organophilic clays in woven or nonwoven webs which are said to be useful in inhibiting fecal enzymes. Such materials may be used, including the reaction products of long chain organic quaternary ammonium compounds with one or more of the following clays: montmorillonite, bentonite, beidellite, hectorite, saponite and stevensite.
Other known enzyme inhibitors and masking agents may be used as skin care additives in the liquid compositions of the present invention, including those that inhibit trypsin and other digestive or fecal enzymes, and urease inhibitors. For example, enzyme inhibitors and antimicrobial agents may be used to prevent the formation of odors in body fluids. Urease inhibitors are disclosed, for example, in international application No. WO 98/26808, which are also said to play a role in odor absorption. Such inhibitors may be incorporated into the liquid component and wet toilet paper of the present invention and include transition metal ions and soluble salts thereof, such as silver, copper, zinc, iron and aluminum salts. The anion may also provide urease inhibition, such as borate, phytate, and the like. Potentially valuable compounds include, but are not limited to, silver chlorate, silver nitrate, mercury acetate, mercury chloride, mercury nitrate, copper metaborate, copper bromate, copper bromide, copper chloride, copper dichromate, copper nitrate, copper salicylate, copper sulfate, zinc acetate, zinc borate, zinc bromate, zinc bromide, zinc chlorate, zinc chloride, zinc sulfate, cadmium acetate, cadmium borate, cadmium bromide, cadmium chlorate, cadmium chloride, cadmium formate, cadmium iodate, cadmium iodide, cadmium permanganate, cadmium nitrate, cadmium sulfate, and gold chloride.
Other salts having urease inhibiting properties include iron and aluminum salts, especially nitrates, and bismuth salts. Other urease inhibitors are disclosed in WO 98/26808, including hydroxamic acids and derivatives thereof; thiourea; a hydroxylamine; salts of phytic acid; plant extracts of various species, including various tannins, such as carob tannin, and derivatives thereof, such as chlorogenic acid derivatives; naturally occurring acids such as ascorbic acid, citric acid and salts thereof; phenylphosphide/phenyl phosphorodiamidite; metal aryl phosphoramide complexes, including substituted phosphoramide compounds; phosphoramides not substituted on nitrogen; boric acid and/or salts thereof, including inter alia borax and/or organoboron acid compounds; a compound disclosed in european patent application No. 0,408,199; sodium dithiocarbamate, copper dithiocarbamate, manganese dithiocarbamate and/or zinc dithiocarbamate; a quinone; phenols; a thiuram; substituted rhodanine acetic acid; alkylated benzoquinones; formamidine disulfide; 1: 3-diketomaleic anhydride; succinamides; phthalic anhydride; benzoic acid; n, N-dihalo-2-imidazolidinone; n-halo-2-oxazolidinone; thio and/or acyl-phosphoryl amides and/or substituted derivatives thereof, thiopyridine-N-oxides, thiopyridines and thiopyrimidines; oxidized sulfur derivatives of diaminophosphinyl compounds; a cyclotriphosphatriene derivative; o-diaminophosphinyl derivatives of oximes; a bromonitro compound; s-aryl and/or alkyl diamido phosphorothioates; a diaminophosphinyl derivative; mono-and/or polyphosphodiamides; 5-substituted benzazole thiol-2-one; n (diaminophosphinyl) arylcarboxamides; alkoxy-1, 2-benzothiazine compounds; and the like.
Many other skin care additives may be incorporated into the liquid components and wet toilet paper of the present invention, including, but not limited to, sunscreens and uv absorbers, acne treatments, medicaments, baking soda (including encapsulated forms thereof), vitamins and derivatives thereof such as vitamin a or E, aloe barbadensis (aloe barbadensis) leaf extract, tocopherol acetate, botanicals (e.g., witch hazel extract and aloe), allantoin, emollients, disinfectants, wrinkle-control or anti-aging hydroxy acids, sun creams, tanning enhancers, skin whiteners, deodorants and antiperspirants, skin benefit and other uses of ceramides, astringents, skin creams, nail polish removers, insect repellents, antioxidants, preservatives, anti-inflammatory agents, and the like, provided that the additive is compatible with the ion-sensitive adhesive composition with which it is associated, particularly the ion-sensitive adhesive composition of the present invention (i.e., they do not cause a significant decrease in the strength of the wet toilet paper in its wet state, before dilution with water, while at the same time making it dispersible in water).
Volume 2,1999 McCutcheon: functional materials, MC publishing company, gren Rock, n.j., new jersey lists useful materials for skin care and other benefits. Many useful skin care botanicals are provided by Active Organics, lewis ville, Tex, texas.
Odor control additives
Suitable odor control additives for the liquid component and wet toilet paper of the present inventionIncluding but not limited to zinc salts; talc powder; sodium bicarbonate, encapsulated perfumes (including microcapsules, macrocapsules, and perfumes encapsulated in liposomes, vesicles, or microemulsions); chelating agents, such as ethylenediaminetetraacetic acid; a zeolite; activated silica, activated carbon particles or fibers; active silica particles; polycarboxylic acids, such as citric acid; cyclodextrins and cyclodextrin derivatives; chitosan or chitin and derivatives thereof; an oxidizing agent; antimicrobial agents, including silver-loaded zeolites (e.g. under the trade mark HEALTHSHIELD)TMThose sold under the BF Technologies (BF Technologies) by Beverly, Massachusetts); triclosan; diatomaceous earth; and mixtures thereof. In addition to controlling odors from the body or body waste, odor control strategies may also be used to mask or control any odor of the treated substrate.
In one embodiment, the liquid component and/or wet wipe comprises a derivatized cyclodextrin, such as hydroxypropyl β -cyclodextrin in solution, which remains on the skin after wiping and provides an odor absorbing layer. In other embodiments, the action of odor sources, such as chelating agents, that bind metal groups necessary for the function of many proteases and other enzymes that typically produce odors, are removed or neutralized by the application of odor control additives. Chelating metal groups can interfere with the action of enzymes and reduce the risk of malodour in the product.
Lee et al, Journal of Textile Research Journal, 69 (2); 104-112,1999 describes the principle of applying chitosan or chitin derivatives to nonwoven webs and cellulose fibers.
Anti-sticking agent
If desired, detackifiers may be used in the liquid component to reduce tackiness. Suitable detackifiers include, but are not limited to, powders such as talc, calcium carbonate, mica; starches, such as corn starch; sugar coating powder; mineral fillers, such as titanium dioxide; silica powder; alumina; a general metal oxide; fermenting powder; diatomaceous earth; and the like. Polymers having low surface energy and other additives may also be used, including various fluorinated polymers, silicone additives, polyolefins (e.g., Polytetrafluoroethylene (PTFE)) and thermoplastics, waxes, detackifiers known in the papermaking industry, including compounds having alkyl side chains, such as those having 16 or more carbons, and the like. Also contemplated are compounds useful as mold release agents for mold and candle manufacture, as well as dry lubricants and fluorinated mold release agents.
Preservatives and antimicrobial agents
The liquid component may also contain preservatives and/or antimicrobial agents. Several preservatives and/or antimicrobial agents, such as Mackstat H66 (available from McIntyre Group, Chicago, il.), have been found to have superior efficacy in preventing bacterial and mold growth. Other suitable preservatives and antimicrobial agents include, but are not limited to, DMDM hydantoin (e.g., Glydant Plus)TMLonza corporation (Lonza, Inc.), feulen, nj (Fair law, n.j.), iodopropynyl butylcarbamate, Kathon (Rohm and Hass), Philadelphia, pennsylvania (philiadelphia, Pa.), methyl paraben, phenoxyethanol, sodium benzoate, propyl paraben, 2-bromo-2-nitropropane-1, 3-diol, benzoic acid, and the like.
Chelating agents
One chelating agent useful in the liquid compositions described herein is tetrasodium glutamate diacetate (Dissolvine GL 47S).
Emulsifier
One emulsifier and surfactant blend useful in the liquid components described herein is cocoglucoside/glyceryl oleate (Lamesoft PO 65).
Wetting agent and cleaning agent
A variety of wetting agents and/or cleaning agents may be used in the liquid component. Suitable wetting agents and/or detergents include, but are not limited to, detergents and nonionic, amphoteric and anionic surfactants, especially amino acid-based surfactants. Amino acid-based surfactant systems, such as those derived from the amino acid L-glutamic acid and other natural fatty acids, can provide pH compatibility and good cleansing ability to human skin while being relatively safe and having improved feel and moisturization compared to other anionic surfactants.
One commercial example of an amino acid-based surfactant is an acyl glutamate salt sold under the name Amisoft by the gourmet corporation of Tokyo, Japan (Ajinomoto corp., Tokyo, Japan). Although amino acid based surfactants may be used in the liquid component, a variety of surfactants may be used in the present invention. Suitable nonionic surfactants include, but are not limited to, the condensation products of ethylene oxide with a hydrophobic (lipophilic) polyoxyalkylene base formed by the condensation of propylene oxide with propylene glycol. The hydrophobic portion of these compounds is desirably of sufficiently high molecular weight to render them water insoluble. The addition of a polyoxyethylene moiety to the hydrophobic moiety increases the overall water solubility of the molecule and the liquid character of the product is retained until the polyoxyethylene content is about 50% of the total weight of the condensation product. Examples of compounds of this type include commercially available Pluronic surfactants (BASF Wyandotte Corp.) such as those in which the polyoxypropylene ether has a molecular weight of about 1500-3000 and a polyoxyethylene content of about 35-55% by weight of the molecule, Pluronic L-62.
Other useful nonionic surfactants include, but are not limited to, C8-C22Condensation products of alkyl alcohols with 2 to 50 moles of ethylene oxide per mole of alcohol. Examples of compounds of this type include C11-C15Condensation products of secondary alkyl alcohols with 3-50 moles of ethylene oxide per mole of alcohol, as TERGITOL of Poly-Tergent SLF series or of Union Carbide (Union Carbide) of Olin chemical (Olin Chemicals)TMSeries of commercially available, i.e. TERGITOLTM25-L-7 by reacting about 7 moles of ethylene oxide with C12-C15Formed by condensation of alkanols.
Other nonionic surfactants useful in the liquid component of the present invention include C6-C12Ethylene oxide esters of alkylphenols, such as (nonylphenoxy) polyoxyethylene ether. Particularly useful are those prepared by condensing about 8 to 12 moles of ethylene oxide with nonylphenolEsters, i.e. IGEPALTMCO series (GAF).
Other nonionic surfactants include, but are not limited to, Alkyl Polyglycosides (APGs) which are derived as condensation products of glucose (D-glucose) with straight or branched chain alcohols. The glycoside portion of the surfactant provides a hydrophilic agent with a high hydroxyl density, which increases water solubility. In addition, the inherent stability of the acetal linkage of the glycoside provides chemical stability in alkaline systems. Furthermore, unlike some nonionic surfactants, alkyl polyglycosides do not have a cloud point and therefore can be formulated without the need for hydrotropes, which are very mild and readily biodegradable nonionic surfactants. Such surfactants are commercially available from commercial Chemical (Horizon Chemical) under the trade names APG-300, APG-350, APG-500 and APG-500.
Silicones are another class of wetting agents available in neat form or in the form of microemulsions, macroemulsions, and the like. One exemplary group of nonionic surfactants is silicone-glycol copolymers. These surfactants are prepared by adding poly (lower) alkyleneoxy chains to the free hydroxyl groups of dimethylpolysiloxane and are commercially available from Dow Coming Corp as Dow Coming 190 and 193 surfactants (CTFA name: dimethicone copolyol).
Anionic surfactants may also be used in the liquid components described herein. Anionic surfactants are useful for their high detergency and include anionic detergent salts having alkyl substituents of 8 to 22 carbon atoms, such as water-soluble alkali metal soaps of higher fatty acids, for example sodium myristate and sodium palmitate. One class of anionic surfactants includes the water-soluble sulfated and sulfonated anionic alkali and alkaline earth metal detergent salts containing a hydrophobic higher alkyl moiety, typically containing from about 8 to 22 carbon atoms, such as higher alkyl mono-or polynuclear aryl sulfonates having from about 1 to 16 carbon atoms in the alkyl group, an example of which is available as the Bio-Soft series, namely Bio-Soft D-40 (Stepan Chemical Co.).
Other useful classes of anionic surfactants include, but are not limited to, alkali metal salts of alkylnaphthalenesulfonic acids (sodium methylnaphthalenesulfonate, Petro AA, stone)Oil chemical company (Petrochemical Corporation)); sulfated higher fatty acid monoglycerides, such as the sodium salt of sulfated monoglycerides of cocoa butter fatty acids and the potassium salt of sulfated monoglycerides of tallow fatty acids; alkali metal salts of sulfated fatty alcohols containing from about 10 to 18 carbon atoms (e.g., sodium lauryl sulfate and sodium stearyl sulfate); c14-C16Sodium alpha olefin sulfonates, such as the Bio-Terge series (Spilamper chemical Co.); alkali metal salts of sulfated ethyleneoxy fatty alcohols (about 3 moles ethylene oxide with C)12-C15Sodium or ammonium sulfates of condensation products of n-alkanols, i.e., Neodol ethoxy sulfate from Shell Chemical Co.); alkali metal salts of higher fatty esters of low molecular weight hydroxyalkyl sulfonic acids, such as fatty acid esters of sodium isothiocyanates, fatty ethanolamide sulfates; fatty acid amides of aminoalkylsulfonic acids, such as lauric acid amide of taurine; and many other anionic organic surfactants such as sodium xylene sulfonate, sodium naphthalene sulfonate, sodium toluene sulfonate and mixtures thereof.
Another class of anionic surfactants includes 8- (4-n-alkyl-2-cyclohexenyl) -octanoic acid, in which the cyclohexenyl ring is substituted with an additional carboxylic acid group. These compounds or their potassium salts are commercially available as diacid 1550 or H-240 from Vireally weckers Corporation (Westvaco Corporation). In general, these anionic surfactants can be used in the form of their alkali metal, ammonium or alkaline earth metal salts.
Skin-moistening agent
The liquid component may also contain one or more emollients. Suitable emollients include, but are not limited to, PEG 75 lanolin, caprylic/capric triglyceride, methyl glucose polyether 20 benzoate, C12-C15Alkyl benzoates, ethoxylated cetyl stearyl alcohol, mixtures of Lambert wax WS-L, Lambert WD-F, Cetiol HE (Henkel Corp. Germany), Glucam P20 (Amerchol), Polyox WSR N-10 (Unicarbide), Polyox WSR N-3000 (Unicarbide), Luviquat (Pasov), Finsolv SLB 101 (Finetex Corp.), mink skin oil, allantoin, stearyl alcohol, Estol 1517(Unichema) and Finsolv SLB 201 (Tencel Inc.)) The products sold by Monomuls 90-O18, Pasteur, and combinations thereof.
The emollient may be in the form of an emollient blend. For example, emollient blends comprise a combination of one or more liquid hydrocarbons (e.g., petrolatum), mineral oil, and the like, vegetable and animal fats (e.g., lanolin, phospholipids, and derivatives thereof), and silicone materials (e.g., one or more alkyl-substituted silicone polymers). The emollient blend can comprise a combination of liquid hydrocarbons (e.g., petrolatum) with dimethicone or with dimethicone and other alkyl substituted silicone polymers. In some embodiments, a blend of liquid hydrocarbon emollients and/or alkyl substituted polysiloxane polymers may be blended with one or more fatty acid ester emollients derived from fatty acids or fatty alcohols. PEG-7 glyceryl cocoate, available as Standamul HE (Heboken, N.J., Hangao, Germany) was prepared.
Water-soluble self-emulsifying emollients may be used in the liquid component, including polyoxyalkoxylated lanolin and polyoxyalkoxylated fatty alcohols, as disclosed in U.S. Pat. No. 4,690,821. The polyoxyalkoxy chain may comprise mixed propyleneoxy and ethyleneoxy units. Lanolin derivatives may contain about 20-70 of such lower alkoxy units, and C12-C20The fatty alcohol will be derivatized with about 8 to 15 lower alkyl units. One such lanolin derivative is lanex AWS (PPG-12-PEG-50, procumbent corp. (Croda, Inc.), New York city, New York, n.y.). Useful poly (15-20) C2-C3The alkoxylate was PPG-5-Ceteth-20, known as Procteyl AWS (David Corp.).
Surface feel modifiers
Surface feel modifiers can be used to improve the feel (e.g., lubricity) of the skin during use of the product. Suitable surface feel modifiers include, but are not limited to, commercial debonders; and softeners, including quaternary ammonium compounds having pendant fatty acid groups, organosilicons, waxes, and the like. Exemplary quaternary ammonium compounds for use as softening agents are disclosed in U.S. patent nos. 3,554,862, 4,144,122, 5,573,637 and 4,476,323.
Perfumes and perfume solubilizers
A wide variety of flavors and flavor solubilizers can be used in the liquid component. Suitable fragrance solubilizers include, but are not limited to, polysorbate 20, propylene glycol, ethanol, isopropanol, diethylene glycol monoethyl ether, dipropylene glycol, diethyl phthalate, triethyl citrate, Amerxool OE-2 (Elegal), Brij 78 and Brij 98(ICI surfactants), Arlasolve 200(ICI surfactants), Calfax 16L-35 (Pilot Chemical Co.)), Capmul POE-S (Abitec Corp.)), Finsolv SUBSNTIAL (Van. TM.), and the like.
Light-shading agent
Suitable opacifiers include, but are not limited to, titanium dioxide or other minerals or pigments, and synthetic opacifiers such as REACTOPAQUETMParticles (available from Sequa Chemicals, inc., Chester, s.c., south carolina).
pH control agent
Suitable pH control agents for the liquid component include, but are not limited to, malic acid, citric acid, hydrochloric acid, acetic acid, sodium hydroxide, sodium citrate, potassium hydroxide, and the like. An appropriate pH range may minimize the amount of skin irritation caused by the liquid component on the skin.
In one embodiment, the pH of the liquid component is between about 1 and about 14, such as between about 2 and about 10, between about 4.5 and about 6.5, between about 4.7 and about 6.3, or between about 4.7 and about 5.2. In one embodiment, the pH is about 4.7. In another embodiment, the pH is about 6.3.
Suitable examples of liquid component formulations according to the present invention are shown in table 1 below. Without limitation, any of the disclosures described for any of the ranges 1-3 and any combinations thereof may be combined into a single exemplary formulation. For example, the liquid formulation may partially contain 68-75 w/w% water and 10-25 w/w% organic solvent.
TABLE 1
Method of making wet wipes
The liquid component may be applied to the homogeneous nonwoven material by methods known in the art. Suitable methods of applying the liquid component include, but are not limited to, perforated pipe, printing, spraying, electrostatic spraying, metering rolls, and dipping. The amount of the liquid component may be metered and uniformly distributed onto the homogeneous fibrous material, or may be non-uniformly distributed onto the homogeneous fibrous material.
The ratio of the liquid component to the nonwoven fibers may be between about 1.5 and about 7.5, such as between about 2.0 and about 3.5 or between about 2.0 and about 3.0.
The wet wipes may be manufactured using a number of techniques well known to those skilled in the art. In one embodiment, these techniques may include the steps of:
1. providing a homogeneous nonwoven material;
2. applying the liquid component described in any of the embodiments herein to a homogeneous nonwoven material to produce wet toilet paper (which may be by wetting the sheets one by one or by spraying/sprinkling a dry stack or roll with the liquid component); and
3. the wet toilet paper is placed in roll form or in stacks and the product is packaged.
The description of the present embodiment of the invention has been presented for purposes of illustration but is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Thus, while the invention has been disclosed in connection with embodiments thereof, it should be understood that other embodiments may fall within the spirit and scope of the invention. The patents and publications cited herein are incorporated by reference in their entirety.
Examples of the invention
Dissolvine GL 47S (disodium glutamate tetraacetate) is a biodegradable chelate and is available from, for example, Aksu Nobel Personal Care.
Lamesoft PO65 is a composite of coco glucoside and glyceryl oleate, available from, for example, Care Chemicals, Germany.
Glycerol polyether-26 is a 26 mole ethoxylate of glycerol and is available from, for example, Leubaokang chemical company of Parteson, N.J. (Lipo Chemicals, Inc., Paterson, N.J.).
Exemplary slosh tube method
The samples were aged in the developer for at least 1 week and then shaken in 2L tap water at 26 rpm for 15 minutes at room temperature.
Each 4 inch test tube (approximately 20 inches long) was filled with 1 liter of tap water, wiped once, and capped at both ends. The test was performed by placing 9 test tubes simultaneously on a shaking box device. The shaking tank is run for a determined period of time (e.g. 15, 30, 45 or 60 minutes). Once the box has been running for the specified amount of time, the test tubes are uncapped. To collect the residue of each test tube, the test tubes were emptied on the same sieve used during the normal shake box test. The samples were not rinsed. All residue that did not pass through the screen was carefully removed from the screen surface and collected on a weighing boat. All tubes were emptied in the same manner and the residue weighed. The post-sloshing dry weight of the material was compared to the pre-sloshing dry weight of the wipe to determine the percent dispersion.
Example 1-exemplary liquid component preparation
TABLE 2
| Water (W) |
| Organic solvent |
| Multivalent salt |
| First corrosion preventionAgent for treating cancer |
| The second preservative |
| First soothing agent |
| A first pH regulator |
| Second soothing agent |
| Chelating agents |
| Second pH regulator |
| Emulsifier |
| Odor neutralizing agent |
| Perfume |
| Moisture-retaining agent |
| Skin-moistening agent |
Example 2-product with ethanol or isopropanol as the main liquid
TABLE 3
Example 3 tensile Strength
The tensile strength of a wet wipe (1) comprising the liquid component of the present invention and a typical wet toilet paper (MTT) (last column) was evaluated as summarized in table 3 below. When used with a nonwoven component, the formulation (1) of the present invention provides the desired functional tensile strength. Typical MTT formulations and nonwoven components fail because they are too weak to function. The remaining test formulations had at least one key ingredient removed. These key ingredients are calcium chloride, dipropylene glycol and glyceryl polyether-26 (the polyethylene glycol ether of glycerin, with an average ethoxylation value of 26). When one or more of the ingredients are removed, the strength of the nonwoven is reduced, making the product unacceptable.
The homogeneous fibrous material used for wipes 1 and a-E comprises cellulosic fibers and a carboxymethyl cellulose binder. The homogeneous fibrous material used in a typical formulation is entirely cellulosic fiber.
TABLE 4
Data based on 24 hour probation of nonwovens
Table 5 below shows that the addition of ethanol instead of some water maintained or increased the tensile strength. Ethanol also allows for the reduction of dipropylene glycol, which enhances the aesthetics of the wipe.
TABLE 5
TABLE 5 continuation
TABLE 5 continuation
These and other advantages of the present invention will be apparent to those skilled in the art from the foregoing description. Accordingly, those skilled in the art will recognize that changes or modifications may be made to the above-described embodiments without departing from the broad inventive concept thereof. It is understood that the invention is not limited to the particular embodiments described herein, but is intended to include all changes and modifications that are within the scope and spirit of the invention.
Claims (21)
1. A wet wipe comprising:
a. a homogeneous fibrous material comprising from about 50 to about 99% w/w of one or more cellulosic fibers and one or more water-soluble binders; and
b. a liquid component comprising
i. About 74% w/w of water,
about 15% w/w dipropylene glycol,
about 5% w/w of glyceryl polyether 26, and
about 4% w/w calcium chloride.
2. The wet wipe of claim 1 wherein the liquid component further comprises a chelating agent, an emulsifier, an emollient, a humectant, a pH adjuster, and an odor neutralizer.
3. The wet wipe of claim 1 wherein said liquid component further comprises a perfume.
4. The wet wipe of claim 1 wherein the liquid component further comprises magnesium aluminum silicate, xanthan gum, corn starch, silica, and any combination thereof.
5. A wet wipe comprising:
a. a homogeneous fibrous material comprising from about 50 to about 99% w/w of one or more cellulosic fibers and one or more water-soluble binders; and
b. a liquid component comprising
i. From about 58 to about 79% w/w water,
about 0 to about 10% w/w dipropylene glycol,
from about 0 to about 10% w/w of glyceryl polyether 26,
from about 0 to about 4% w/w calcium chloride, and
from about 5 to about 20% w/w ethanol.
6. A wet wipe, cleaning wipe, or personal wipe according to any one of claims 1 to 5 wherein said wipe exhibits a wet tensile strength in a machine direction of greater than or equal to about 150 grams/inch and a wet tensile strength in a cross-machine direction of greater than about 75 grams/inch.
7. The wet wipe, cleaning wipe, or personal wipe of claim 6, wherein after immersion in water for any duration, the machine direction wet tensile strength is reduced to less than or equal to about 50 grams per inch and the cross direction wet tensile strength is reduced to less than or equal to about 25 grams per inch.
8. A wet wipe, cleaning wipe or personal wipe according to claim 6 wherein said wet tensile strength in the machine direction and said wet tensile strength in the cross direction are reduced such that they cannot be measured any further after immersion in water for any duration.
9. A wet wipe, cleaning wipe, or personal wipe according to claim 6 wherein said wipe has a dispersion rate of greater than or equal to about 90% after a time of about 10 seconds when measured according to the fourth edition flushability guide document of INDA fg502.r1(18) sloshing box disintegration test.
10. The wet wipe, cleaning wipe, or personal wipe of claim 6, wherein said wipe has a dispersion rate of greater than or equal to about 70% after a time of about 1 minute when measured according to the fourth edition flushability guide document of INDA fg502.r1(18) sloshing box disintegration test.
11. A wet wipe, cleaning wipe or personal wipe according to claim 6 wherein said wipe has a dispersion rate of greater than or equal to about 50% after a time of about 2 minutes, when measured, for example, according to the fourth edition of the flushability guidelines document FG502.R1(18) sloshing box disintegration test of INDA.
12. A wet wipe, cleaning wipe, or personal wipe according to claim 6 wherein said wipe has a dispersion rate of greater than or equal to about 30% after a time of about 5 minutes when measured according to the fourth edition flushability guide document of INDA fg502.r1(18) sloshing box disintegration test.
13. A wet wipe, cleaning wipe or personal wipe according to any one of claims 1 to 12 wherein said wipe loses all tensile strength in the longitudinal and transverse directions when flushed in a toilet when tested according to the home pump test described in the fourth edition flushability guidelines document of INDA fg503.r1(18) home pump test, and said wipe splits to less than 1/2 inches under the turbulence of a single flush of a standard home toilet when passed through a toilet bowl hole for transfer to a home pump sump2Without forming any blockage in the home pump or leaving any remaining intact wipes in the basin.
14. The wet wipe, cleaning wipe, or personal wipe of any one of claims 1 to 12, wherein said wipe exhibits a longitudinal tensile strength of less than about 50 grams per inch and a transverse tensile strength of less than about 25 grams per inch when soaked in water past a municipal pump when tested according to the fourth edition flushability guidelines document of INDA fg507.r1(18) municipal sewage pump test, broken to equal to or less than 1/2 inches2Resulting in less than 2% power increase or no power increase.
15. A wet wipe, cleaning wipe or personal wipe according to any one of claims 1 to 12 wherein said wipe exhibits no measurable strength when soaked in water past a municipal pump, broken to equal to or less than 1/2 inches, when tested according to the fourth edition flushability guide document of INDA, fg507.r1(18) municipal sewage pump test2To produce less than 2%Power increase or no power increase.
16. The wet wipe, cleaning wipe, or personal wipe of any one of claims 1 to 12, wherein said wet toilet paper, cleaning wipe, or personal wipe is packaged.
17. The wipe according to any one of claims 1 to 12, wherein said homogeneous fibrous material is comprised of 100% plant based material.
18. The wipe according to any one of claims 1 to 12, wherein the homogeneity of said fibrous material is observed by scanning electron microscopy.
19. The wipe according to claim 5, wherein said liquid further comprises a quaternary ammonium compound.
20. The wipe according to claim 1 or 5, wherein said one or more cellulosic fibers comprise pulp fibers or regenerated cellulosic fibers and said one or more water-soluble binders comprise carboxymethyl cellulose.
21. The wipe according to claim 20, wherein said one or more cellulosic fibers are present from about 75 to 99% w/w of the total weight of said wipe and said carboxymethyl cellulose is present from about 1 to about 25% w/w of the total weight of said wipe.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201862730054P | 2018-09-12 | 2018-09-12 | |
| US62/730,054 | 2018-09-12 | ||
| PCT/US2019/050826 WO2020056146A1 (en) | 2018-09-12 | 2019-09-12 | Moist wipe having enhanced dispersibility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112839621A true CN112839621A (en) | 2021-05-25 |
Family
ID=69778468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980067630.1A Pending CN112839621A (en) | 2018-09-12 | 2019-09-12 | Wet wipes having enhanced dispersibility |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20220047468A1 (en) |
| EP (1) | EP3849497A4 (en) |
| JP (1) | JP2022500399A (en) |
| KR (1) | KR20210080365A (en) |
| CN (1) | CN112839621A (en) |
| AU (1) | AU2019339408A1 (en) |
| CA (1) | CA3112467A1 (en) |
| MX (1) | MX2021002956A (en) |
| WO (1) | WO2020056146A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997040815A1 (en) * | 1996-04-30 | 1997-11-06 | The Procter & Gamble Company | Cleaning articles comprising a polarphobic region and a high internal phase inverse emulsion |
| WO1999001536A1 (en) * | 1997-07-01 | 1999-01-14 | The Procter & Gamble Company | Cleaning articles comprising a cellulosic fibrous structure having discrete low basis weight regions and an inverse emulsion |
| US20020086039A1 (en) * | 1999-12-07 | 2002-07-04 | Sean Lee | New cosmetic, personal care, cleaning agent, and nutritional supplement compositions and methods of making and using same |
| US20110293931A1 (en) * | 2010-06-01 | 2011-12-01 | Nathan John Vogel | Single-Ply Dispersible Wet Wipes with Enhanced Dispersibility |
| US20150150792A1 (en) * | 2009-12-23 | 2015-06-04 | Shannon Elizabeth Klingman | Products and methods for reducing malodor from the pudendum |
| CN107693381A (en) * | 2017-09-28 | 2018-02-16 | 诺斯贝尔化妆品股份有限公司 | A kind of bar cloth veneer film containing flexible nano-liposomes |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6338855B1 (en) * | 1996-10-25 | 2002-01-15 | The Procter & Gamble Company | Cleansing articles for skin and/or hair which also deposit skin care actives |
| US11583489B2 (en) * | 2016-11-18 | 2023-02-21 | First Quality Tissue, Llc | Flushable wipe and method of forming the same |
-
2019
- 2019-09-12 JP JP2021513794A patent/JP2022500399A/en active Pending
- 2019-09-12 US US17/274,840 patent/US20220047468A1/en active Pending
- 2019-09-12 KR KR1020217010539A patent/KR20210080365A/en unknown
- 2019-09-12 AU AU2019339408A patent/AU2019339408A1/en active Pending
- 2019-09-12 CN CN201980067630.1A patent/CN112839621A/en active Pending
- 2019-09-12 WO PCT/US2019/050826 patent/WO2020056146A1/en unknown
- 2019-09-12 CA CA3112467A patent/CA3112467A1/en active Pending
- 2019-09-12 EP EP19859623.1A patent/EP3849497A4/en active Pending
- 2019-09-12 MX MX2021002956A patent/MX2021002956A/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997040815A1 (en) * | 1996-04-30 | 1997-11-06 | The Procter & Gamble Company | Cleaning articles comprising a polarphobic region and a high internal phase inverse emulsion |
| WO1999001536A1 (en) * | 1997-07-01 | 1999-01-14 | The Procter & Gamble Company | Cleaning articles comprising a cellulosic fibrous structure having discrete low basis weight regions and an inverse emulsion |
| US20020086039A1 (en) * | 1999-12-07 | 2002-07-04 | Sean Lee | New cosmetic, personal care, cleaning agent, and nutritional supplement compositions and methods of making and using same |
| US20150150792A1 (en) * | 2009-12-23 | 2015-06-04 | Shannon Elizabeth Klingman | Products and methods for reducing malodor from the pudendum |
| US20110293931A1 (en) * | 2010-06-01 | 2011-12-01 | Nathan John Vogel | Single-Ply Dispersible Wet Wipes with Enhanced Dispersibility |
| CN107693381A (en) * | 2017-09-28 | 2018-02-16 | 诺斯贝尔化妆品股份有限公司 | A kind of bar cloth veneer film containing flexible nano-liposomes |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2019339408A1 (en) | 2021-04-08 |
| EP3849497A1 (en) | 2021-07-21 |
| KR20210080365A (en) | 2021-06-30 |
| JP2022500399A (en) | 2022-01-04 |
| US20220047468A1 (en) | 2022-02-17 |
| MX2021002956A (en) | 2021-08-11 |
| WO2020056146A1 (en) | 2020-03-19 |
| EP3849497A4 (en) | 2022-08-17 |
| CA3112467A1 (en) | 2020-03-19 |
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Effective date of registration: 20221128 Address after: USA New York Applicant after: NICE-PAK PRODUCTS, Inc. Applicant after: Hasso Co.,Ltd. Address before: USA New York Applicant before: NICE-PAK PRODUCTS, Inc. |